Philip diehl



, Patented June 20, I899..

.fiavez @M ifM/M P. DIEHL & M. HEMLEB. SEWING MACHINE SHUTTLE.

(Application filed Apr. 18, 1897.)

(No Model.)

N TED STATES PATENT QEEIQE.

PHILIP DIEHL AND MARTINIHEMLEB, or ELIZABETH, NEW" JERSEY, ASSIGNORS TO THE SINGER MANUFACTURING COMPANY, on NEW JERSEY.

SEWING-MACHINE SHUTTLE;

SPECIFICATION forming part of Letters Patent No. 627,104, dated Application filed April 13, 1897.

T0 aZZ whom it may concern:

Be it known that we, PHILIP DIEHL and MARTIN HEMLEB, citizens of the United States, residing at Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Sewing- Machine Shuttles, of which the following is a struction that while it will contain a bobbin capable of holding a relatively large amount of thread said bobbin-case is so arranged relative to the shuttle that it may be encom passed by comparatively small loops of needle-thread, this construction and arrangement being such that said loopsmay be cast over the bobbin-case by a lesser circular movement of the shuttle than is required in carrying loops of needle-thread around the stationary bobbin-cases of central-bobbin;

shuttles or shuttles equipped with stationary bobbin-cases placed concentric with the axes of movement of said shuttles. This object is efiected by providing a barrel or cylin drical bobbin-case adaptedto contain a long or cylindrical bobbin, said barrel bobbincase being held stationary in the usual manner by being provided with a prong or finger, which engages some part of the shuttle-race, and being supported on a pin on the shuttle arranged concentric with the axis of movement of the latter, or approximately so, but which pin passes through the bobbin-case at one side of the bdbbin-chamber of the latter.

Another object of the invention is toprovide the shuttle with an intermittingly-acting or automatic tension device, which will relax the tension of. the shuttle-thread when the work is being advanced by the feed, so that said thread may at such times draw June 20, 1899.

Serial No. 631,960. (No model.)

freely from the'bobbin or cop in the shuttle. This result is preferably effected by providing the bobbin-case-supporting pin of the shuttle with a small cam or eccentric, which at a certain predetermined period in the movement of the shuttle will slightly lift the hearing end of a spring-pressed tension-lever from the thread, and thus release the latter from the gripping-pressure of said lever.

In the accompanying drawings, Figure lis a front side View of theimproved shuttle and its bobbin-case, theshuttle being represented in the position which it assumes when it is about to take a loop of needle-thread; and Fig. 2 is a similar rear view with the shuttle in a position far enough forward to have carried a loop of needle-thread to a cast-oft position around the bobbin-case, the said bobbin-case being in section to illustrate the automatic tension; Fig. 3 is a detail view of theshuttle-pin and the locking and tension' lever. Fig. 4 is a detail view of the bobbincase, and Fig. 5 a detail view of the bobbin. A denotes a segmental oscillating or rotating shuttle ofwell-known form, provided with a loop-seizing beak a, and having at or near its axis or center of movement-a bobbin-casesupporting pin a. I

B is a barrel or cylindrical bobbin-case adapted to contain a long or cylindrical bobbin c, and provided at one side of its bobbinchamber b with a hole I) to receive the pin a. The bobbincase B is furnished with a prong or finger cl to engage a stationary part of the shuttle-race to hold the said bobbincasestationary while the shuttle oscillates or rotates about it.

E is a spring-pressed locking and tension lever provided with a small lug c to enter an annular groove a in the bobbin-case-supporting pin a to lock the said bobbin-case to said pin, the inner or lowerend of said lever being engaged by .a spring f, which presses the upper or outer end of said lever toward a bearing portion of the bobbin-case and between which bearing portion and said lever the bobbin-thread runs on its way from the bobbin to the work. The tension of the spring f maybe regulated to vary the tension by the screw f, which attaches said spring to the IOO bobbin-case. The lever E is provided with .the lip e which overhangs the end of the 7 said lever from the thread, and thus relax the tension, the shuttle being therebyfurnished within itself with an automatic or intermittingly-acting tension device. To prevent the shuttle-thread from running entirely loose when its tension is thus relaxed, a light checkspring eiwhich bears constantly on the thread, is preferably provided. This check-spring, as herein shown, is soldered or otherwise attached at its inner end to the lever E.

By the employment of a stationary barrel bobbin-case to contain a cylindrical bobbin a bobbin with a greater thread capacity relative to the size of needle-loops required to encompass the samemay be used; also, by providing the stationary bobbin-case with a support which is at one side of the bobbinchamber thereof a long or extended bobbincase-supporting surface or pin may be emeccentric to the shuttle enables the latteras' ployed, while the location of the bobbin-case it advances into and expands a loop of needle-thread to more and more closely approach the bobbin-case as said shuttle moves from the position shown in Fig. 1 to that shown in Fig. 2, so that in the last-named or cast-over position of the shuttle the bobbin-case is comparatively close up to the periphery of the shuttle, thus requiring but a relatively small loop of needle-thread to go around the bobbin-case and enabling the shuttle to carry this loop to the cast-over position by a relatively small circular vmovement which need be but little, if any, more than one hundred and fifty degrees. This will permit the use of smooth and easy movements of the shuttleoperating rock shafts when the improved shuttles are applied to oscillating-shit ttle machines, and when they are used in rotaryshuttle machines the objectionable and jerkydifferential movements of the rotating-shuttle shafts will not be necessary, and still plenty of time in the'rotation of the driving-shaft for the proper and easy action of the feed and take-up will be allowed. The automatic tension on the shuttle-thread afforded by the improved shuttle is also a desirable feature, as will be understood by those skilled in the art to which the invention relates.

The bobbin-case B is self-threading, in that it is provided with a thread slot or pas sage b running from the heel of the said bobbin-case to the thread-egress hole 11 and from said egress-hole the thread runs between the bearing end of the tension and locking lever E and the outer surface of the bobbincase to the delivery eye or hole I), whence it passes to the work, slots 5 being out between the lugs b 'and the body of the bobbin-case to enable the thread to be drawn beneath the tension-lever E and the check-spring e in threading. The free end of the said checkspring is preferably loosely connected with the said tension-lever, so that when the latter is lifted by pressing on the projection 6 said check-spring will also be raised for convenience in threading the loose or slotted connection of .the free end of said check-spring with the lip e of said lever, permitting said check-spring to rest on the thread when the pressure of the said lever is relieved from the thread by the slight lifting movements of said lever produced by the cam or eccentric a with which the pin a is provided.

The terms automatic ant v. intermittingly acting as hereinbefore employed in connection with the tension device are intended to be synonymous, in that the term automatic as applied to a tension device is now well known in the art as referring to an intermittingly-acting tension device or a tension device the frictional action of which is automatically varied during the formation of each stitch while the machine is in operation.

Having thus described our invention, we claim and desire to secure by Letters Patent- 1. The combination with a segmental sewing-machine shuttle, of a bobbin-case having a pivotal connection with said shuttle at a point which is concentric with the curved periphery of the latter, or approximately so, but which is located out of line, in the direction of the axis of the shuttle, with the bobbinchamber of the said bobbin-case.

2. The combination with a circularly-movable segmental sewing-machine shuttle having a centrally-placed bobbin-case-supporting p'in, of a stationary bobbin-case sustained by said pin and having a bobbin-chamber the longitudinal axis of which is transverse to the axis of said shuttle, to contain a transverselyplaced long or cylindrical bobbin.

3. A sewing-machine shuttle provided with an intermittingly-acting tension device for the shuttle-thread, all of the parts of said tension device necessary to secure the intermittent action being parts of said shuttle.

at. A sewing-machine shuttle provided with an intermittingly-acting tension device for the shuttle-thread, all the parts of which tension device, necessary to secure the intermittent action, are parts of said shuttle, combined with a check-spring which serves to exert a light drag or tension on the thread when the normal tension thereon is relaxed.

5. The combination with a circularly-moving sewing-machine shuttle provided with a bobbin-case-supporting pin having a cam or eccentric, of a stationary bobbin-case having a tension lever or device to be operated by 6. The combination with a eircnlarly-inov- 0n the said thread when the normal tension 10 ing sewing-machine shuttle provided With a is relaxed.

bobbin-case-suppcrting pin having a cam or In testimony whereof We affix our signae eccentric, of a stationary bobbin-case having tnres in presence of two Witnesses. 5 a tension lever or device to be operated by PHILIP DIEHL.

said cam or eccentric to relax the tension on MARTIN HEMLEB. the shuttle-thread at intervals When the ma- \Vitnesses: I ehineis in 0peration,andacheck-spring which J. G. GREENE,

servesto exert a constant light tension or drag HENRY OALVER. 

